Process for removing iron and organic germs from water.



IT STA ES ATEN OFFICE.

ROBERT GAINS, OF PANKOW, NEAR BERLIN, GERMANY, ASSIGNOR TO 3'. D. RIEDEL AKTIE'NGESELLSCHAFT, OF BERLIN, GERMANY, A CORPORATION OF GERMANY.

PROCESS FOR REMOVING IRON AND ORGANIC GERMS FROM WATER.

earner.

No Drawing.

To all whom it may concern:

Be it known that I, ROBERT GANS, a subject of the German Emperor, residing at Pankow, near Berlin, Germany, have invented a certain new and useful Process for Ren'ioving Iron and Organic Germs from lVater, of which the following isa specification.

It has already been proposed to treat water with 'manganic oxid (also called black oxid Mn(),) for removing the iron by oxidation. According to the present process the water to be relieved of iron is treated with insoluble higher oxids of manganese with the aid of natural or artificial zeolites. If, for instance, calciunrzeolites are first treated with a solution of a salt of manganous oxid, an exchange of calcium for manganese takes place, thereby forming manganese zeolites, which on treatment withpermanganates act according to the following equation, while higher oxids of manganese are separated out.

2SiO .Al O,.Mn0+CaMn O,,=

. 2SiO,.Al O,,.CaO+Mn,O In this manner a higher stage of oxidation than .that of manganic oxid is there fore produced. This higher oxid of manganese in a fine state of division is intimately distributed throughout the zeolite, which is easily permeable for water and to which it adheres firmly. lit yieldsup its oxygen much more easily-than the manganic oxidh For this reason the removal of the iron from water by oxidation of the same, by the finely distributed oxids of manganese takes place even, when the water is filtered through the zeolite mass at a speed of-filtration of 30 meter and upward, while Specification of Letters Patent.

Patented Mar. 8, 1910.

Application filed August 19, 1909. Serial No. 513,635.

compounds dissolved in the water, may be easily reconverted into the higher oxids of manganese, by treating the zeolites with .materials which readily yield up oxygen,

such as permanganates, manganates, persulfates and ozone, after which the zeolite mass 0 ntaining the latter in a fine state of distribution may be again used for the removal of iron from water.

Together with the iron any manganese, which-may be present in thewater in the form of a solution, is removed from the water by the present process.

If water containing organic germs is filtered through the zeolites obtained by the action of permanganate solutions on manganese zeolites and containing higher oxide of manganese finely distributed, the organic matter and the germs of the water are deproperty of easily yielding oxygen possessed by the higher oxids of manganese. Consequently the present process is applica ble also for the preparation of drinking water free from germs. For this purpose the process may be modified by directly adding to theavater an excess of permanganate solution and then filtering it through zeolites containing low oxids of manganese. The low oxids reduce the excess of permanganate and take uprthe manganese as well as the remaining bases of the permanganate, so that a drinking water is obtained,

. which no longer contains any permanganate.

What I claim is i The process'for the removal of iron and organic germs from water, which consists in treating the Water with insoluble higher oxids of manganese with the aid of zeolites, substantially as described. a

In testimony whereof'T have hereunto set my hand in thepresence of twosubscribing witnesses.

ROBERT GANS.

stroyed during the filtration, owing to. the 

